In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Govt on mission to lift wages: Morrison

Scott Treasurer has promised the 2017 budget will continue the task of positioning the nation for future prosperity, with a mission to support Australians to earn more.

The treasurer used the last parliamentary question time before budget day on May 9 to spruik the Turnbull government's achievements in the past year.

He said the 2016 budget was an economic plan for jobs and growth to support the nation through the substantial changes that are taking place in the country.

"While there are many regions in this country that are doing extremely well ... we also know there are other parts of the country with an old industrial base which are struggling," he told MPs on Thursday.

"Our mission is to support Australians to earn more."

Since the 2016 budget, the government had delivered some $25 billion in budget improvement measures that are taking the nation's finances towards balance.

He said when a government is disciplined it can deliver affordable child care without raiding the finances of taxpayers, provide $2.9 billion in hospital funding to the states and territories, and work towards ensuring the national disability insurance scheme is properly funded.